<div class="dropdown-menu pull-right dropdown-menu-scale">
  <a class="dropdown-item" ng-click="vm.changeAvater()">更换头像</a>
  <a class="dropdown-item" ng-click="vm.changePass()">修改密码</a>
  <a class="dropdown-item" ng-click="vm.signOut()">退出</a>
</div>
